Warp stop-motion for looms



J. M. FREEMAN.

WARP STOP MOTION FOR LOOMS. APPLICATION FILED NOV. 14, 1915.

1,355,955. Patented Oct. 19,1920.

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JOHN M. FREEMAN, OF HICKORY, NORTH CAROLINA,

ASSIGNOR TO DRAPER CORPO- RATION, OF"HO-PEDALE, MASSACHUSETTS, ACORPORATION OF MAIN'E.

WARP STOP-MOTION FOR LOOMS.

Application filed November 14, 1919. Serial No. 337,928.

To all whom it may concern:

Be it known that I, JOHN M. FREEMAN, a citizen of the United States,residing at Hickory, county of Catawba, State of North Carolina, haveinvented an Improvement in Warp Stop-Motions for Looms, of

which the following description, in connec-- tion with the accompanyingdrawing, is a specification, like characters on the drawing representinglike parts. This invention relates to warp stop mechanism for looms ofthe drop wire type. In this type of mechanism each warp end of the loomnormally supports a drop wire which when the warp end'breaks falls intothe path of a vibrating or reciprocating feeler, which being arrestedthereby, initiates the action of suitable mechanism for stopping theloom. These dro wires are slotted near their upper ends and supportedupon suitable drop wire bars. The drop wire bars rest at their ends inopen top seats in the loom frame in a common type of such mechanism.

When the whip roll is high, and when a harness frame moves to a highposition, or when for any other reason a heavy tension is placed uponthe warp in such a way as to jerk or lift the drop wires upwardly it notinfrequently happens that the drop wire bar is thrown out of its seatwith consequent obvious disastrous results.

The object of this invention is to provide a simple and effective meansfor holding the drop wire supporting bar or bars down in the seats, andpreventing injury to the loom or disarrangement of the mechanism byhaving the drop wire bar or bars thrown out of the seats.

The nature and object of the invention will appear more fully from theaccompanying description and drawings and will be particularly pointedout in the claims.

The drawings illustrate so much of an ordinary type of loom as isnecessary to a disclosure of the invention.

In the drawings Figure 1 is a view partially in vertical cross sectionand looking at the side of the loom from the inside, many of the partsbeing broken away, and only sufiicient parts being shown to disclose theinvention.

Fig. 2 is a view on a larger scale similar to Fig. 1 of the partsimmediately concerned with the invention.

Specification of Letters Patent.

Patented Oct. 19, 1920.

i Fig. 3 is a side elevation partially broken away of one end of thewarp supporting bar, drop wire bars, their connections to,

the loom frame, and a preferred form of device embodying the invention.

As the present invention is concerned with but one detail of the loom itis sufli cient to describe the construction and operation of the loomonly in the most general way.

The warp "ends 1 extend from the whip roll 2 past the lease rod 3, overthe warp supporting bar '4, past the lease rod 5, through the heddles 6,through the reed breast beam 9.

The warp supporting bar 4 is secured at its ends as by bolts 10 inbrackets ll'secured to the loom sides loom.

In the form of warp stop motion illustrated, a pair of drop wire bars 12and 13 are located one at each side of the warp supporting bar 4, andalso extend across the loom and rest at their ends in open top seats 14formed in the brackets 11 which are connected to, or form a part of, theloom frame. The drop wires 15 are of the usual 7 on the lay 8, to thetype, that is, thin, flat, slotted, metal members. These drop wires arethreaded upon the drop wire bars 12 and 13 and each one hangs upon andis normallyheld elevated by a warp end. If a warp end breaks, thecorrespondlng drop wire falls until it comes into the path of theconstantly vibrating and extends across the of the harness frames feeler16. The movement of this feeler is I the supporting bar, it notinfrequently happens that the drop wires are jerked or lifted so high asto jerk or throw the drop wire bar upon which they are guided out fromits seat in the loom frame.

To prevent this highly undesirable result and to enable the warp stopmotion to be operated satisfactorily under all positions of the whiproll and under all degrees of tension, and under any range of movementof the harness frames, thls invention provides means for holding thedrop wire in its seat.

A preferred construction for securing this result is illustrated andcomprises a pair of hold down'devices which may be and preferably areeach in the form of an inverted U- haped metalclamp 17. One of theseclamps is preferably located near each end of the drop wire bars. Thisclamp fits over some rigid portion of theloom such for example as thewarp supporting bar 4, and is so positioned that its ends 18 extend overthe drop wire bars at each side of the warp supporting bar. This holddown device is removably secured or locked in position as by theheadless set screw 19 passing therethrough and engaging the warpsupporting bar.

This device is readily constructed and applied to existing looms, andefficiently secures the desired results. By simply unloosening the,set'screw 19 it is readily removed when it is desired to change, orremove the drop wires.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is- 1. A warp stop mechanism for loomscomprising bars at seats in the loom frame, and an inverted U-shapeddevice removably secured to and a warp supporting bar, drop wirestraddling the supporting bar with its ends the sides thereof seated inopen top may be removed from its seat by an upward lift, a hold downdevice operative position over and holding the end extending when in thedrop wire bar thereof in its seat, and

means for removably securing the hold down device in its operativeposition.

In testimony whereof, I have signed my name to this specification.

JOHN M. FREEMAN.

